Zuckerberg's Twitter and Pinterest accounts were compromised this week, and the hacker (or hackers) responsible claim they got the tech CEO's password — " dadada" — from the LinkedIn dataset. That's because he was allegedly using the same password for multiple accounts. A handful of other celebrities also had accounts hacked, possibly from the same breach.

Password manager apps will remember all your passwords for you. All you have to remember is one super-strong password to get into the application. A lot of these managers will also come up with hard-to-hack passwords for you to use on other accounts.

A really good — not to mention free — password manager that will work on mobile devices and computers is Dashlane. Another good option that has a free trial period before you have to pay is 1Password.